obligate

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obligate

verb agree to perform, agree to be burrened with, assume a duty, assume a moral responsibility for, assume responsibility for, assume the performance of, become legally responsible for, become obliged, charged with, committed to accomplish, compel, contracted, covenanted, indebted to, promise to do
Associated concepts: contractual duties, implied obligations
See also: assign, coerce, compel, constrain, detail, encumber, entail, exact, force, guarantee, necessitate, press, require
References in periodicals archive ?
Ehrlichiae are obligately intraleukocytic bacteria.
Rocky Mountain spotted fever (RMSF) is a febrile ex-anthematic disease caused by Rickettsia rickettsii, a gram-negative, obligately intracellular pathogen.
Although the obligately halophilic protozoan oyster pathogen Haplosporidium nelsoni (MSX) had not been detected in Patuxent River oysters since 1992, it was detected at low levels in midriver oysters during 1999 and 2000 (MDNR 2001), coincident with increasing salinity during four consecutive drought years (1999-2002).
The larval stage obligately feed on the blood of nestlings (Sabrosky et al.
Epiphytes are salient features of subtropical and tropical forest, with many species appearing to be obligately dependent on facilitation by others for light.
Second-hatching chicks were shown to have higher levels of circulating testosterone 1 day after hatching, as well as during aggressive encounters with older siblings in obligately siblicidal Nazca Boobies (Sula granti) (Ferree et al.
The genus Rickettsia comprises obligately intracellular, gram-negative bacteria.